Tom and Diane book a week-long vacation at a private beach house. They invite their friends, Mark and Julia, along to help defray the cost of rental. They look forward to a week's worth of sun, fun and relaxation from stressful jobs.
Mark, a gym franchise owner, is captivated by Diane's attributes. Tom finds himself drawn to the timid and plain-looking Julia. But not everything is as it appears on the surface.Mark is intent on seeing more of Tom's wife and will do whatever it takes to accomplish this. As the flirting and teasing increases in tempo with every passing hour, they realize there is a broader relationship developing.
Tom watches his wife taken, if temporarily, in a swing with an ending that crosses the line from kink to outrage. Meanwhile, he develops a relationship with Julia that is deep and lasting. In the end, none of them want it to end.